[mpich-discuss] Not able to run MPI program parallely...

[Albert Spade]

Yes I am sure.
I created one file by name hosts in /root and its contents are
beowulf.master
beowulf.node1
beowulf.node2
beowulf.node3
beowulf.node4

I have one more file in /etc by name hosts and its contents are:

[root at beowulf ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4
localhost4.localdomain4
::1         localhost localhost.localdomain localhost6
localhost6.localdomain6
172.16.20.31 beowulf.master
172.16.20.32 beowulf.node1
172.16.20.33 beowulf.node2
172.16.20.34 beowulf.node3
172.16.20.35 beowulf.node4
[root at beowulf ~]#

On Tue, May 1, 2012 at 11:15 PM, Pavan Balaji <balaji at mcs.anl.gov> wrote:

>
> On 05/01/2012 12:39 PM, Albert Spade wrote:
>
>> [root at beowulf ~]# mpiexec -f hosts -n 4 /opt/mpich2-1.4.1p1/examples/.**
>> /cpi
>> Process 0 of 4 is on beowulf.master
>> Process 3 of 4 is on beowulf.master
>> Process 1 of 4 is on beowulf.master
>> Process 2 of 4 is on beowulf.master
>> Fatal error in PMPI_Reduce: Other MPI error, error stack:
>> PMPI_Reduce(1270).............**..: MPI_Reduce(sbuf=0xbff0fd08,
>> rbuf=0xbff0fd00, count=1, MPI_DOUBLE, MPI_SUM, root=0, MPI_COMM_WORLD)
>> failed
>> MPIR_Reduce_impl(1087)........**..:
>> MPIR_Reduce_intra(895)........**..:
>> MPIR_Reduce_binomial(144).....**..:
>> MPIDI_CH3U_Recvq_FDU_or_AEP(**380): Communication error with rank 2
>> MPIR_Reduce_binomial(144).....**..:
>> MPIDI_CH3U_Recvq_FDU_or_AEP(**380): Communication error with rank 1
>> ^CCtrl-C caught... cleaning up processes
>>
>
> In your previous email you said that your host file contains this:
>
>
> beowulf.master
> beowulf.node1
> beowulf.node2
> beowulf.node3
> beowulf.node4
>
> The above output does not match this.  Process 1 should be scheduled on
> node1.  So something is not correct here.  Are you sure the information you
> gave us is right?
>
>
> --
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji
>
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